Someone hooked up an RX 6900 XT to a Steam Deck

The guys at ETA Prime decided to hook up a full size external desktop graphics card to Valve’s Steam Deck console. Since the Steam Deck does not have a Thunderbolt port, the only way to connect an external GPU is through the M.2 slot. Currently, the Steam Deck does not support NVIDIA GeForce graphics cards, but it will work with AMD Radeon card, which is no surprise as the Steam Deck is based on the AMD platform.

With everything plugged in, ETA Prime was running 3DMark Fire Strike, with a graphics score of 26855. This compares to the 4856 score of the integrated RDNA2 graphics. We can definitely see that the Steam Deck’s Van Gogh APU (Zen2) and M.2 connection are bottlenecking the RX 6900 XT.

Next up was 3DMark Time Spy, where the RX 6900 XT has a graphics score of 15579 compared to the 1576 of the integrated RDNA2 graphics. This makes the RX 6900 XT almost 10x faster!

With the RX 6900 XT, the Steam Deck can play games in 4K such as Witcher 3 (~108 FPS, Ultra) or GTA 5 (~73 FPS, Very High). It can also play newer games like Elden Ring or Cyberpunk 2077 with FPS between 47 – 70 at 1080p and high settings. Watch the full video below!

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